.page-faq {
  --faq-idx: 232px;
  --faq-gap: clamp(28px, 4.5vw, 64px);
  background: var(--ky-night);
  color: var(--ky-white);
  font-family: var(--ky-sans);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-head {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 6vw, 68px) 0 clamp(40px, 6vw, 76px);
  background: linear-gradient(158deg, var(--ky-turf) 0%, var(--ky-night) 62%);
  border-bottom: var(--ky-hair);
}

.page-faq .faq-head::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: clamp(200px, 32vw, 440px);
  aspect-ratio: 1 / 1;
  background: var(--ky-volt);
  opacity: .08;
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  pointer-events: none;
}

.page-faq .faq-title {
  position: relative;
  font-family: var(--ky-serif);
  font-weight: 800;
  font-size: clamp(29px, 5.4vw, 58px);
  line-height: 1.14;
  letter-spacing: .02em;
  margin: 16px 0 0;
  max-width: 17ch;
  color: var(--ky-cream);
}

.page-faq .faq-lead {
  position: relative;
  margin-top: clamp(16px, 2.4vw, 26px);
  color: var(--ky-white);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  max-width: 60ch;
}

.page-faq .faq-quick {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: var(--ky-hair);
}

.page-faq .faq-quick li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 0;
  border-bottom: var(--ky-hair-soft);
}

.page-faq .faq-quick__k {
  font-family: var(--ky-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ky-volt);
}

.page-faq .faq-quick__v {
  font-size: 14px;
  color: var(--ky-muted);
  line-height: 1.5;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding: clamp(40px, 6vw, 82px) 0 clamp(56px, 8vw, 108px);
  border-top: var(--ky-hair);
}

.page-faq .faq-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  position: static;
}

.page-faq .faq-index__cap {
  margin: 0;
  font-family: var(--ky-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ky-muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-top: var(--ky-hair);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0 12px 13px;
  border-bottom: var(--ky-hair-soft);
  border-left: 2px solid transparent;
  color: var(--ky-white);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color .2s var(--ky-ease), border-color .2s var(--ky-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--ky-volt);
  border-left-color: var(--ky-volt);
  outline: none;
}

.page-faq .faq-index__no {
  flex: none;
  font-family: var(--ky-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ky-muted);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-answers {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 120px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(46px, 6.5vw, 84px);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-family: var(--ky-serif);
  font-weight: 700;
  font-size: clamp(21px, 2.9vw, 31px);
  line-height: 1.3;
  letter-spacing: .02em;
  color: var(--ky-cream);
  border-bottom: var(--ky-hair);
  padding-bottom: 14px;
}

.page-faq .faq-group__no {
  flex: none;
  font-family: var(--ky-mono);
  font-size: 13px;
  color: var(--ky-volt);
}

.page-faq .faq-group:target .faq-group__title {
  color: var(--ky-volt);
}

.page-faq .faq-group__intro {
  margin: 12px 0 4px;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ky-muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: var(--ky-hair-soft);
  border-left: 1px solid transparent;
  transition: background-color .24s var(--ky-ease), border-color .24s var(--ky-ease);
}

.page-faq .faq-item[open] {
  background: var(--ky-turf);
  border-left-color: var(--ky-grid);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 16px 16px 14px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.6vw, 16.5px);
  font-weight: 500;
  line-height: 1.65;
  color: var(--ky-white);
}

.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q::after {
  content: "";
  flex: none;
  margin-left: auto;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid var(--ky-volt);
  transform: translateY(3px);
  transition: transform .22s var(--ky-ease);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  transform: rotate(180deg) translateY(-3px);
}

.page-faq .faq-item__a {
  padding: 0 18px 20px 24px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ky-white);
  max-width: 66ch;
}

.page-faq .faq-item__a p {
  margin: 0;
}

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
  margin-top: 20px;
  align-items: start;
}

.page-faq .faq-split__copy {
  min-width: 0;
}

.page-faq .faq-split__figure {
  margin: 0;
}

.page-faq .faq-split__figure .ky-figure__media {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--ky-hair);
}

/* ---------- 巡检刻度 ---------- */
.page-faq .faq-ticks {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.page-faq .faq-tick {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--ky-grid);
}

.page-faq .faq-tick__t {
  font-family: var(--ky-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ky-volt);
}

.page-faq .faq-tick__l {
  font-size: 12px;
  line-height: 1.55;
  color: var(--ky-muted);
}

/* ---------- 结尾指向 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(48px, 7vw, 90px);
  padding-top: clamp(26px, 3.6vw, 42px);
  border-top: var(--ky-hair);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--ky-serif);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--ky-cream);
}

.page-faq .faq-cta__text {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ky-muted);
}

.page-faq .faq-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-quick li {
    padding-right: 22px;
    border-right: var(--ky-hair-soft);
  }

  .page-faq .faq-quick li:nth-child(2n) {
    border-right: 0;
    padding-right: 0;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-split--flip .faq-split__figure {
    order: -1;
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 990px) {
  .page-faq .faq-body__inner {
    grid-template-columns: var(--faq-idx) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
  }

  .page-faq .faq-quick {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-quick li:nth-child(2n) {
    border-right: var(--ky-hair-soft);
    padding-right: 22px;
  }

  .page-faq .faq-quick li:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}